Rats:

"Wedge the tip of a spudger beneath the left speaker cable connector.

Gently pry the left speaker cable connector up off from its socket on the logic board.

Be sure you are prying up on the connector, not the socket itself."

I accidentally pried up on the socket, which looks like it was soldered to the board. Left speaker doesn't work, of course. I assume there is no fix for this, other than replacing the board??